--- a/hostapd/hostapd_cli.c
+++ b/hostapd/hostapd_cli.c
@@ -757,7 +757,7 @@ static int wpa_ctrl_command_sta(struct w
 	}
 
 	buf[len] = '\0';
-	if (memcmp(buf, "FAIL", 4) == 0)
+	if (memcmp(buf, "FAIL", 4) == 0 || memcmp(buf, "UNKNOWN COMMAND", 15) == 0)
 		return -1;
 	if (print)
 		printf("%s", buf);
